I have had my king sized sleep number bed for about 4 years and it is the only bed that I will own from now on (unless I don't have a choice in the matter).
Let me mention another potential option for those of you who may be interested in a sleep number bed but have cost constraints. QVC offers a sleep number bed to members that allows you to make installment payments over six months billed directly to your credit card. That plan worked out great for me and I have not regretted the decision for one minute.
I agree with CZ and Mary 100%.
EJ